Blender Texture Brush Paint Doesn't have Variety/ Falloff
In the video there is Size Pressure for the radius activated. You can see it in the screenshot. It's the little icon behind the radius editbox on the top of the screen. Size Pressure only works with drawing tablets where you can control the pressure with the pen.
Shift+S activates Stabilize Stroke under Stroke settings. It adds a delay between the cursor and the stroke shown by a line. Painting with it feels like dragging a plow and you can draw smoother lines.